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763122ade7
Some Linux symbols (for example __vt_event_wait) are interpreted by the demangler as C++ mangled names, which of course they aren't. Disable kernel symbol demangling by default to avoid this, and allow enabling it with a new option --demangle-kernel for those who wish it. Reported-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Avi Kivity <avi@cloudius-systems.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1410581705-26968-1-git-send-email-avi@cloudius-systems.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1267 lines
32 KiB
C
1267 lines
32 KiB
C
/*
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* builtin-top.c
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*
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* Builtin top command: Display a continuously updated profile of
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* any workload, CPU or specific PID.
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*
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* Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
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* 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Improvements and fixes by:
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*
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* Arjan van de Ven <arjan@linux.intel.com>
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* Yanmin Zhang <yanmin.zhang@intel.com>
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* Wu Fengguang <fengguang.wu@intel.com>
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* Mike Galbraith <efault@gmx.de>
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* Paul Mackerras <paulus@samba.org>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "builtin.h"
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#include "perf.h"
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#include "util/annotate.h"
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#include "util/cache.h"
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#include "util/color.h"
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#include "util/evlist.h"
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#include "util/evsel.h"
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#include "util/machine.h"
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#include "util/session.h"
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#include "util/symbol.h"
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#include "util/thread.h"
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#include "util/thread_map.h"
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#include "util/top.h"
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#include "util/util.h"
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#include <linux/rbtree.h>
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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#include "util/cpumap.h"
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#include "util/xyarray.h"
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#include "util/sort.h"
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#include "util/intlist.h"
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#include "arch/common.h"
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#include "util/debug.h"
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#include <assert.h>
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#include <elf.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <termios.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <time.h>
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#include <sched.h>
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#include <sys/syscall.h>
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#include <sys/prctl.h>
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#include <sys/wait.h>
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#include <sys/uio.h>
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#include <sys/utsname.h>
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#include <sys/mman.h>
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#include <linux/unistd.h>
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#include <linux/types.h>
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static volatile int done;
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#define HEADER_LINE_NR 5
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static void perf_top__update_print_entries(struct perf_top *top)
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{
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top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
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}
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static void perf_top__sig_winch(int sig __maybe_unused,
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siginfo_t *info __maybe_unused, void *arg)
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{
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struct perf_top *top = arg;
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get_term_dimensions(&top->winsize);
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perf_top__update_print_entries(top);
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}
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static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
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{
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struct symbol *sym;
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struct annotation *notes;
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struct map *map;
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int err = -1;
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if (!he || !he->ms.sym)
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return -1;
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sym = he->ms.sym;
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map = he->ms.map;
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/*
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* We can't annotate with just /proc/kallsyms
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*/
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if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
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!dso__is_kcore(map->dso)) {
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pr_err("Can't annotate %s: No vmlinux file was found in the "
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"path\n", sym->name);
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sleep(1);
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return -1;
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}
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notes = symbol__annotation(sym);
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if (notes->src != NULL) {
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pthread_mutex_lock(¬es->lock);
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goto out_assign;
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}
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pthread_mutex_lock(¬es->lock);
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if (symbol__alloc_hist(sym) < 0) {
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pthread_mutex_unlock(¬es->lock);
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pr_err("Not enough memory for annotating '%s' symbol!\n",
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sym->name);
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sleep(1);
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return err;
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}
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err = symbol__annotate(sym, map, 0);
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if (err == 0) {
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out_assign:
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top->sym_filter_entry = he;
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}
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pthread_mutex_unlock(¬es->lock);
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return err;
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}
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static void __zero_source_counters(struct hist_entry *he)
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{
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struct symbol *sym = he->ms.sym;
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symbol__annotate_zero_histograms(sym);
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}
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static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
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{
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struct utsname uts;
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int err = uname(&uts);
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ui__warning("Out of bounds address found:\n\n"
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"Addr: %" PRIx64 "\n"
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"DSO: %s %c\n"
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"Map: %" PRIx64 "-%" PRIx64 "\n"
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"Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
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"Arch: %s\n"
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"Kernel: %s\n"
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"Tools: %s\n\n"
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"Not all samples will be on the annotation output.\n\n"
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"Please report to linux-kernel@vger.kernel.org\n",
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ip, map->dso->long_name, dso__symtab_origin(map->dso),
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map->start, map->end, sym->start, sym->end,
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sym->binding == STB_GLOBAL ? 'g' :
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sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
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err ? "[unknown]" : uts.machine,
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err ? "[unknown]" : uts.release, perf_version_string);
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if (use_browser <= 0)
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sleep(5);
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map->erange_warned = true;
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}
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static void perf_top__record_precise_ip(struct perf_top *top,
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struct hist_entry *he,
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int counter, u64 ip)
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{
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struct annotation *notes;
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struct symbol *sym;
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int err = 0;
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if (he == NULL || he->ms.sym == NULL ||
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((top->sym_filter_entry == NULL ||
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top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
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return;
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sym = he->ms.sym;
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notes = symbol__annotation(sym);
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if (pthread_mutex_trylock(¬es->lock))
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return;
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ip = he->ms.map->map_ip(he->ms.map, ip);
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if (ui__has_annotation())
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err = hist_entry__inc_addr_samples(he, counter, ip);
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pthread_mutex_unlock(¬es->lock);
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/*
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* This function is now called with he->hists->lock held.
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* Release it before going to sleep.
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*/
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pthread_mutex_unlock(&he->hists->lock);
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if (err == -ERANGE && !he->ms.map->erange_warned)
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ui__warn_map_erange(he->ms.map, sym, ip);
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else if (err == -ENOMEM) {
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pr_err("Not enough memory for annotating '%s' symbol!\n",
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sym->name);
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sleep(1);
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}
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pthread_mutex_lock(&he->hists->lock);
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}
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static void perf_top__show_details(struct perf_top *top)
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{
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struct hist_entry *he = top->sym_filter_entry;
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struct annotation *notes;
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struct symbol *symbol;
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int more;
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if (!he)
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return;
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symbol = he->ms.sym;
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notes = symbol__annotation(symbol);
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pthread_mutex_lock(¬es->lock);
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if (notes->src == NULL)
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goto out_unlock;
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printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
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printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
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more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
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0, top->sym_pcnt_filter, top->print_entries, 4);
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if (top->zero)
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symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
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else
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symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
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if (more != 0)
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printf("%d lines not displayed, maybe increase display entries [e]\n", more);
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out_unlock:
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pthread_mutex_unlock(¬es->lock);
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}
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static void perf_top__print_sym_table(struct perf_top *top)
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{
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char bf[160];
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int printed = 0;
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const int win_width = top->winsize.ws_col - 1;
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puts(CONSOLE_CLEAR);
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perf_top__header_snprintf(top, bf, sizeof(bf));
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printf("%s\n", bf);
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perf_top__reset_sample_counters(top);
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printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
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if (top->sym_evsel->hists.stats.nr_lost_warned !=
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top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
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top->sym_evsel->hists.stats.nr_lost_warned =
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top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
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color_fprintf(stdout, PERF_COLOR_RED,
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"WARNING: LOST %d chunks, Check IO/CPU overload",
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top->sym_evsel->hists.stats.nr_lost_warned);
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++printed;
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}
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if (top->sym_filter_entry) {
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perf_top__show_details(top);
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return;
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}
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if (top->zero) {
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hists__delete_entries(&top->sym_evsel->hists);
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} else {
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hists__decay_entries(&top->sym_evsel->hists,
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top->hide_user_symbols,
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top->hide_kernel_symbols);
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}
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hists__collapse_resort(&top->sym_evsel->hists, NULL);
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hists__output_resort(&top->sym_evsel->hists);
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hists__output_recalc_col_len(&top->sym_evsel->hists,
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top->print_entries - printed);
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putchar('\n');
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hists__fprintf(&top->sym_evsel->hists, false,
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top->print_entries - printed, win_width,
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top->min_percent, stdout);
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}
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static void prompt_integer(int *target, const char *msg)
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{
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char *buf = malloc(0), *p;
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size_t dummy = 0;
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int tmp;
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fprintf(stdout, "\n%s: ", msg);
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if (getline(&buf, &dummy, stdin) < 0)
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return;
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p = strchr(buf, '\n');
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if (p)
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*p = 0;
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p = buf;
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while(*p) {
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if (!isdigit(*p))
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goto out_free;
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p++;
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}
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tmp = strtoul(buf, NULL, 10);
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*target = tmp;
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out_free:
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free(buf);
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}
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static void prompt_percent(int *target, const char *msg)
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{
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int tmp = 0;
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prompt_integer(&tmp, msg);
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if (tmp >= 0 && tmp <= 100)
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*target = tmp;
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}
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static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
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{
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char *buf = malloc(0), *p;
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struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
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struct rb_node *next;
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size_t dummy = 0;
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/* zero counters of active symbol */
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if (syme) {
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__zero_source_counters(syme);
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top->sym_filter_entry = NULL;
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}
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fprintf(stdout, "\n%s: ", msg);
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if (getline(&buf, &dummy, stdin) < 0)
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goto out_free;
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p = strchr(buf, '\n');
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if (p)
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*p = 0;
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next = rb_first(&top->sym_evsel->hists.entries);
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while (next) {
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n = rb_entry(next, struct hist_entry, rb_node);
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if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
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found = n;
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break;
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}
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next = rb_next(&n->rb_node);
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}
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if (!found) {
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fprintf(stderr, "Sorry, %s is not active.\n", buf);
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sleep(1);
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} else
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perf_top__parse_source(top, found);
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out_free:
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free(buf);
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}
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static void perf_top__print_mapped_keys(struct perf_top *top)
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{
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char *name = NULL;
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if (top->sym_filter_entry) {
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struct symbol *sym = top->sym_filter_entry->ms.sym;
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name = sym->name;
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}
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fprintf(stdout, "\nMapped keys:\n");
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fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
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fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
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if (top->evlist->nr_entries > 1)
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fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel));
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fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
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fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
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fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
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fprintf(stdout, "\t[S] stop annotation.\n");
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fprintf(stdout,
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"\t[K] hide kernel_symbols symbols. \t(%s)\n",
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top->hide_kernel_symbols ? "yes" : "no");
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fprintf(stdout,
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"\t[U] hide user symbols. \t(%s)\n",
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top->hide_user_symbols ? "yes" : "no");
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fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
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fprintf(stdout, "\t[qQ] quit.\n");
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}
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static int perf_top__key_mapped(struct perf_top *top, int c)
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{
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switch (c) {
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case 'd':
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case 'e':
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case 'f':
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case 'z':
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case 'q':
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case 'Q':
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case 'K':
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case 'U':
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case 'F':
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case 's':
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case 'S':
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return 1;
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case 'E':
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return top->evlist->nr_entries > 1 ? 1 : 0;
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default:
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break;
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}
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return 0;
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}
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static bool perf_top__handle_keypress(struct perf_top *top, int c)
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{
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bool ret = true;
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if (!perf_top__key_mapped(top, c)) {
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struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
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struct termios save;
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perf_top__print_mapped_keys(top);
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fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
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fflush(stdout);
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set_term_quiet_input(&save);
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poll(&stdin_poll, 1, -1);
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c = getc(stdin);
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tcsetattr(0, TCSAFLUSH, &save);
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if (!perf_top__key_mapped(top, c))
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return ret;
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}
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|
|
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switch (c) {
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case 'd':
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prompt_integer(&top->delay_secs, "Enter display delay");
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if (top->delay_secs < 1)
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top->delay_secs = 1;
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break;
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case 'e':
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prompt_integer(&top->print_entries, "Enter display entries (lines)");
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if (top->print_entries == 0) {
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struct sigaction act = {
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.sa_sigaction = perf_top__sig_winch,
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.sa_flags = SA_SIGINFO,
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};
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perf_top__sig_winch(SIGWINCH, NULL, top);
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sigaction(SIGWINCH, &act, NULL);
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} else {
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signal(SIGWINCH, SIG_DFL);
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}
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break;
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case 'E':
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if (top->evlist->nr_entries > 1) {
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/* Select 0 as the default event: */
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int counter = 0;
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|
|
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fprintf(stderr, "\nAvailable events:");
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|
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evlist__for_each(top->evlist, top->sym_evsel)
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fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
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prompt_integer(&counter, "Enter details event counter");
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|
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if (counter >= top->evlist->nr_entries) {
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top->sym_evsel = perf_evlist__first(top->evlist);
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fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
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sleep(1);
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break;
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}
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evlist__for_each(top->evlist, top->sym_evsel)
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if (top->sym_evsel->idx == counter)
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break;
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} else
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top->sym_evsel = perf_evlist__first(top->evlist);
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break;
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case 'f':
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prompt_integer(&top->count_filter, "Enter display event count filter");
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break;
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|
case 'F':
|
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prompt_percent(&top->sym_pcnt_filter,
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"Enter details display event filter (percent)");
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break;
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case 'K':
|
|
top->hide_kernel_symbols = !top->hide_kernel_symbols;
|
|
break;
|
|
case 'q':
|
|
case 'Q':
|
|
printf("exiting.\n");
|
|
if (top->dump_symtab)
|
|
perf_session__fprintf_dsos(top->session, stderr);
|
|
ret = false;
|
|
break;
|
|
case 's':
|
|
perf_top__prompt_symbol(top, "Enter details symbol");
|
|
break;
|
|
case 'S':
|
|
if (!top->sym_filter_entry)
|
|
break;
|
|
else {
|
|
struct hist_entry *syme = top->sym_filter_entry;
|
|
|
|
top->sym_filter_entry = NULL;
|
|
__zero_source_counters(syme);
|
|
}
|
|
break;
|
|
case 'U':
|
|
top->hide_user_symbols = !top->hide_user_symbols;
|
|
break;
|
|
case 'z':
|
|
top->zero = !top->zero;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void perf_top__sort_new_samples(void *arg)
|
|
{
|
|
struct perf_top *t = arg;
|
|
perf_top__reset_sample_counters(t);
|
|
|
|
if (t->evlist->selected != NULL)
|
|
t->sym_evsel = t->evlist->selected;
|
|
|
|
if (t->zero) {
|
|
hists__delete_entries(&t->sym_evsel->hists);
|
|
} else {
|
|
hists__decay_entries(&t->sym_evsel->hists,
|
|
t->hide_user_symbols,
|
|
t->hide_kernel_symbols);
|
|
}
|
|
|
|
hists__collapse_resort(&t->sym_evsel->hists, NULL);
|
|
hists__output_resort(&t->sym_evsel->hists);
|
|
}
|
|
|
|
static void *display_thread_tui(void *arg)
|
|
{
|
|
struct perf_evsel *pos;
|
|
struct perf_top *top = arg;
|
|
const char *help = "For a higher level overview, try: perf top --sort comm,dso";
|
|
struct hist_browser_timer hbt = {
|
|
.timer = perf_top__sort_new_samples,
|
|
.arg = top,
|
|
.refresh = top->delay_secs,
|
|
};
|
|
|
|
perf_top__sort_new_samples(top);
|
|
|
|
/*
|
|
* Initialize the uid_filter_str, in the future the TUI will allow
|
|
* Zooming in/out UIDs. For now juse use whatever the user passed
|
|
* via --uid.
|
|
*/
|
|
evlist__for_each(top->evlist, pos)
|
|
pos->hists.uid_filter_str = top->record_opts.target.uid_str;
|
|
|
|
perf_evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,
|
|
&top->session->header.env);
|
|
|
|
done = 1;
|
|
return NULL;
|
|
}
|
|
|
|
static void display_sig(int sig __maybe_unused)
|
|
{
|
|
done = 1;
|
|
}
|
|
|
|
static void display_setup_sig(void)
|
|
{
|
|
signal(SIGSEGV, display_sig);
|
|
signal(SIGFPE, display_sig);
|
|
signal(SIGINT, display_sig);
|
|
signal(SIGQUIT, display_sig);
|
|
signal(SIGTERM, display_sig);
|
|
}
|
|
|
|
static void *display_thread(void *arg)
|
|
{
|
|
struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
|
|
struct termios save;
|
|
struct perf_top *top = arg;
|
|
int delay_msecs, c;
|
|
|
|
display_setup_sig();
|
|
pthread__unblock_sigwinch();
|
|
repeat:
|
|
delay_msecs = top->delay_secs * 1000;
|
|
set_term_quiet_input(&save);
|
|
/* trash return*/
|
|
getc(stdin);
|
|
|
|
while (!done) {
|
|
perf_top__print_sym_table(top);
|
|
/*
|
|
* Either timeout expired or we got an EINTR due to SIGWINCH,
|
|
* refresh screen in both cases.
|
|
*/
|
|
switch (poll(&stdin_poll, 1, delay_msecs)) {
|
|
case 0:
|
|
continue;
|
|
case -1:
|
|
if (errno == EINTR)
|
|
continue;
|
|
/* Fall trhu */
|
|
default:
|
|
c = getc(stdin);
|
|
tcsetattr(0, TCSAFLUSH, &save);
|
|
|
|
if (perf_top__handle_keypress(top, c))
|
|
goto repeat;
|
|
done = 1;
|
|
}
|
|
}
|
|
|
|
tcsetattr(0, TCSAFLUSH, &save);
|
|
return NULL;
|
|
}
|
|
|
|
static int symbol_filter(struct map *map, struct symbol *sym)
|
|
{
|
|
const char *name = sym->name;
|
|
|
|
if (!map->dso->kernel)
|
|
return 0;
|
|
/*
|
|
* ppc64 uses function descriptors and appends a '.' to the
|
|
* start of every instruction address. Remove it.
|
|
*/
|
|
if (name[0] == '.')
|
|
name++;
|
|
|
|
if (!strcmp(name, "_text") ||
|
|
!strcmp(name, "_etext") ||
|
|
!strcmp(name, "_sinittext") ||
|
|
!strncmp("init_module", name, 11) ||
|
|
!strncmp("cleanup_module", name, 14) ||
|
|
strstr(name, "_text_start") ||
|
|
strstr(name, "_text_end"))
|
|
return 1;
|
|
|
|
if (symbol__is_idle(sym))
|
|
sym->ignore = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hist_iter__top_callback(struct hist_entry_iter *iter,
|
|
struct addr_location *al, bool single,
|
|
void *arg)
|
|
{
|
|
struct perf_top *top = arg;
|
|
struct hist_entry *he = iter->he;
|
|
struct perf_evsel *evsel = iter->evsel;
|
|
|
|
if (sort__has_sym && single) {
|
|
u64 ip = al->addr;
|
|
|
|
if (al->map)
|
|
ip = al->map->unmap_ip(al->map, ip);
|
|
|
|
perf_top__record_precise_ip(top, he, evsel->idx, ip);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void perf_event__process_sample(struct perf_tool *tool,
|
|
const union perf_event *event,
|
|
struct perf_evsel *evsel,
|
|
struct perf_sample *sample,
|
|
struct machine *machine)
|
|
{
|
|
struct perf_top *top = container_of(tool, struct perf_top, tool);
|
|
struct addr_location al;
|
|
int err;
|
|
|
|
if (!machine && perf_guest) {
|
|
static struct intlist *seen;
|
|
|
|
if (!seen)
|
|
seen = intlist__new(NULL);
|
|
|
|
if (!intlist__has_entry(seen, sample->pid)) {
|
|
pr_err("Can't find guest [%d]'s kernel information\n",
|
|
sample->pid);
|
|
intlist__add(seen, sample->pid);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (!machine) {
|
|
pr_err("%u unprocessable samples recorded.\r",
|
|
top->session->stats.nr_unprocessable_samples++);
|
|
return;
|
|
}
|
|
|
|
if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
|
|
top->exact_samples++;
|
|
|
|
if (perf_event__preprocess_sample(event, machine, &al, sample) < 0)
|
|
return;
|
|
|
|
if (!top->kptr_restrict_warned &&
|
|
symbol_conf.kptr_restrict &&
|
|
al.cpumode == PERF_RECORD_MISC_KERNEL) {
|
|
ui__warning(
|
|
"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
|
|
"Check /proc/sys/kernel/kptr_restrict.\n\n"
|
|
"Kernel%s samples will not be resolved.\n",
|
|
!RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
|
|
" modules" : "");
|
|
if (use_browser <= 0)
|
|
sleep(5);
|
|
top->kptr_restrict_warned = true;
|
|
}
|
|
|
|
if (al.sym == NULL) {
|
|
const char *msg = "Kernel samples will not be resolved.\n";
|
|
/*
|
|
* As we do lazy loading of symtabs we only will know if the
|
|
* specified vmlinux file is invalid when we actually have a
|
|
* hit in kernel space and then try to load it. So if we get
|
|
* here and there are _no_ symbols in the DSO backing the
|
|
* kernel map, bail out.
|
|
*
|
|
* We may never get here, for instance, if we use -K/
|
|
* --hide-kernel-symbols, even if the user specifies an
|
|
* invalid --vmlinux ;-)
|
|
*/
|
|
if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
|
|
al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
|
|
RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
|
|
if (symbol_conf.vmlinux_name) {
|
|
ui__warning("The %s file can't be used.\n%s",
|
|
symbol_conf.vmlinux_name, msg);
|
|
} else {
|
|
ui__warning("A vmlinux file was not found.\n%s",
|
|
msg);
|
|
}
|
|
|
|
if (use_browser <= 0)
|
|
sleep(5);
|
|
top->vmlinux_warned = true;
|
|
}
|
|
}
|
|
|
|
if (al.sym == NULL || !al.sym->ignore) {
|
|
struct hist_entry_iter iter = {
|
|
.add_entry_cb = hist_iter__top_callback,
|
|
};
|
|
|
|
if (symbol_conf.cumulate_callchain)
|
|
iter.ops = &hist_iter_cumulative;
|
|
else
|
|
iter.ops = &hist_iter_normal;
|
|
|
|
pthread_mutex_lock(&evsel->hists.lock);
|
|
|
|
err = hist_entry_iter__add(&iter, &al, evsel, sample,
|
|
top->max_stack, top);
|
|
if (err < 0)
|
|
pr_err("Problem incrementing symbol period, skipping event\n");
|
|
|
|
pthread_mutex_unlock(&evsel->hists.lock);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
|
|
{
|
|
struct perf_sample sample;
|
|
struct perf_evsel *evsel;
|
|
struct perf_session *session = top->session;
|
|
union perf_event *event;
|
|
struct machine *machine;
|
|
u8 origin;
|
|
int ret;
|
|
|
|
while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
|
|
ret = perf_evlist__parse_sample(top->evlist, event, &sample);
|
|
if (ret) {
|
|
pr_err("Can't parse sample, err = %d\n", ret);
|
|
goto next_event;
|
|
}
|
|
|
|
evsel = perf_evlist__id2evsel(session->evlist, sample.id);
|
|
assert(evsel != NULL);
|
|
|
|
origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
|
|
|
|
if (event->header.type == PERF_RECORD_SAMPLE)
|
|
++top->samples;
|
|
|
|
switch (origin) {
|
|
case PERF_RECORD_MISC_USER:
|
|
++top->us_samples;
|
|
if (top->hide_user_symbols)
|
|
goto next_event;
|
|
machine = &session->machines.host;
|
|
break;
|
|
case PERF_RECORD_MISC_KERNEL:
|
|
++top->kernel_samples;
|
|
if (top->hide_kernel_symbols)
|
|
goto next_event;
|
|
machine = &session->machines.host;
|
|
break;
|
|
case PERF_RECORD_MISC_GUEST_KERNEL:
|
|
++top->guest_kernel_samples;
|
|
machine = perf_session__find_machine(session,
|
|
sample.pid);
|
|
break;
|
|
case PERF_RECORD_MISC_GUEST_USER:
|
|
++top->guest_us_samples;
|
|
/*
|
|
* TODO: we don't process guest user from host side
|
|
* except simple counting.
|
|
*/
|
|
/* Fall thru */
|
|
default:
|
|
goto next_event;
|
|
}
|
|
|
|
|
|
if (event->header.type == PERF_RECORD_SAMPLE) {
|
|
perf_event__process_sample(&top->tool, event, evsel,
|
|
&sample, machine);
|
|
} else if (event->header.type < PERF_RECORD_MAX) {
|
|
hists__inc_nr_events(&evsel->hists, event->header.type);
|
|
machine__process_event(machine, event, &sample);
|
|
} else
|
|
++session->stats.nr_unknown_events;
|
|
next_event:
|
|
perf_evlist__mmap_consume(top->evlist, idx);
|
|
}
|
|
}
|
|
|
|
static void perf_top__mmap_read(struct perf_top *top)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < top->evlist->nr_mmaps; i++)
|
|
perf_top__mmap_read_idx(top, i);
|
|
}
|
|
|
|
static int perf_top__start_counters(struct perf_top *top)
|
|
{
|
|
char msg[512];
|
|
struct perf_evsel *counter;
|
|
struct perf_evlist *evlist = top->evlist;
|
|
struct record_opts *opts = &top->record_opts;
|
|
|
|
perf_evlist__config(evlist, opts);
|
|
|
|
evlist__for_each(evlist, counter) {
|
|
try_again:
|
|
if (perf_evsel__open(counter, top->evlist->cpus,
|
|
top->evlist->threads) < 0) {
|
|
if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
|
|
if (verbose)
|
|
ui__warning("%s\n", msg);
|
|
goto try_again;
|
|
}
|
|
|
|
perf_evsel__open_strerror(counter, &opts->target,
|
|
errno, msg, sizeof(msg));
|
|
ui__error("%s\n", msg);
|
|
goto out_err;
|
|
}
|
|
}
|
|
|
|
if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
|
|
ui__error("Failed to mmap with %d (%s)\n",
|
|
errno, strerror_r(errno, msg, sizeof(msg)));
|
|
goto out_err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
return -1;
|
|
}
|
|
|
|
static int perf_top__setup_sample_type(struct perf_top *top __maybe_unused)
|
|
{
|
|
if (!sort__has_sym) {
|
|
if (symbol_conf.use_callchain) {
|
|
ui__error("Selected -g but \"sym\" not present in --sort/-s.");
|
|
return -EINVAL;
|
|
}
|
|
} else if (callchain_param.mode != CHAIN_NONE) {
|
|
if (callchain_register_param(&callchain_param) < 0) {
|
|
ui__error("Can't register callchain params.\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __cmd_top(struct perf_top *top)
|
|
{
|
|
struct record_opts *opts = &top->record_opts;
|
|
pthread_t thread;
|
|
int ret;
|
|
|
|
top->session = perf_session__new(NULL, false, NULL);
|
|
if (top->session == NULL)
|
|
return -ENOMEM;
|
|
|
|
machines__set_symbol_filter(&top->session->machines, symbol_filter);
|
|
|
|
if (!objdump_path) {
|
|
ret = perf_session_env__lookup_objdump(&top->session->header.env);
|
|
if (ret)
|
|
goto out_delete;
|
|
}
|
|
|
|
ret = perf_top__setup_sample_type(top);
|
|
if (ret)
|
|
goto out_delete;
|
|
|
|
machine__synthesize_threads(&top->session->machines.host, &opts->target,
|
|
top->evlist->threads, false);
|
|
ret = perf_top__start_counters(top);
|
|
if (ret)
|
|
goto out_delete;
|
|
|
|
top->session->evlist = top->evlist;
|
|
perf_session__set_id_hdr_size(top->session);
|
|
|
|
/*
|
|
* When perf is starting the traced process, all the events (apart from
|
|
* group members) have enable_on_exec=1 set, so don't spoil it by
|
|
* prematurely enabling them.
|
|
*
|
|
* XXX 'top' still doesn't start workloads like record, trace, but should,
|
|
* so leave the check here.
|
|
*/
|
|
if (!target__none(&opts->target))
|
|
perf_evlist__enable(top->evlist);
|
|
|
|
/* Wait for a minimal set of events before starting the snapshot */
|
|
poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
|
|
|
|
perf_top__mmap_read(top);
|
|
|
|
ret = -1;
|
|
if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
|
|
display_thread), top)) {
|
|
ui__error("Could not create display thread.\n");
|
|
goto out_delete;
|
|
}
|
|
|
|
if (top->realtime_prio) {
|
|
struct sched_param param;
|
|
|
|
param.sched_priority = top->realtime_prio;
|
|
if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
|
|
ui__error("Could not set realtime priority.\n");
|
|
goto out_join;
|
|
}
|
|
}
|
|
|
|
while (!done) {
|
|
u64 hits = top->samples;
|
|
|
|
perf_top__mmap_read(top);
|
|
|
|
if (hits == top->samples)
|
|
ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
|
|
}
|
|
|
|
ret = 0;
|
|
out_join:
|
|
pthread_join(thread, NULL);
|
|
out_delete:
|
|
perf_session__delete(top->session);
|
|
top->session = NULL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
callchain_opt(const struct option *opt, const char *arg, int unset)
|
|
{
|
|
symbol_conf.use_callchain = true;
|
|
return record_callchain_opt(opt, arg, unset);
|
|
}
|
|
|
|
static int
|
|
parse_callchain_opt(const struct option *opt, const char *arg, int unset)
|
|
{
|
|
symbol_conf.use_callchain = true;
|
|
return record_parse_callchain_opt(opt, arg, unset);
|
|
}
|
|
|
|
static int perf_top_config(const char *var, const char *value, void *cb)
|
|
{
|
|
struct perf_top *top = cb;
|
|
|
|
if (!strcmp(var, "top.call-graph"))
|
|
return record_parse_callchain(value, &top->record_opts);
|
|
if (!strcmp(var, "top.children")) {
|
|
symbol_conf.cumulate_callchain = perf_config_bool(var, value);
|
|
return 0;
|
|
}
|
|
|
|
return perf_default_config(var, value, cb);
|
|
}
|
|
|
|
static int
|
|
parse_percent_limit(const struct option *opt, const char *arg,
|
|
int unset __maybe_unused)
|
|
{
|
|
struct perf_top *top = opt->value;
|
|
|
|
top->min_percent = strtof(arg, NULL);
|
|
return 0;
|
|
}
|
|
|
|
int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
|
|
{
|
|
int status = -1;
|
|
char errbuf[BUFSIZ];
|
|
struct perf_top top = {
|
|
.count_filter = 5,
|
|
.delay_secs = 2,
|
|
.record_opts = {
|
|
.mmap_pages = UINT_MAX,
|
|
.user_freq = UINT_MAX,
|
|
.user_interval = ULLONG_MAX,
|
|
.freq = 4000, /* 4 KHz */
|
|
.target = {
|
|
.uses_mmap = true,
|
|
},
|
|
},
|
|
.max_stack = PERF_MAX_STACK_DEPTH,
|
|
.sym_pcnt_filter = 5,
|
|
};
|
|
struct record_opts *opts = &top.record_opts;
|
|
struct target *target = &opts->target;
|
|
const struct option options[] = {
|
|
OPT_CALLBACK('e', "event", &top.evlist, "event",
|
|
"event selector. use 'perf list' to list available events",
|
|
parse_events_option),
|
|
OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
|
|
OPT_STRING('p', "pid", &target->pid, "pid",
|
|
"profile events on existing process id"),
|
|
OPT_STRING('t', "tid", &target->tid, "tid",
|
|
"profile events on existing thread id"),
|
|
OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
|
|
"system-wide collection from all CPUs"),
|
|
OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
|
|
"list of cpus to monitor"),
|
|
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
|
|
"file", "vmlinux pathname"),
|
|
OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
|
|
"don't load vmlinux even if found"),
|
|
OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
|
|
"hide kernel symbols"),
|
|
OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
|
|
"number of mmap data pages",
|
|
perf_evlist__parse_mmap_pages),
|
|
OPT_INTEGER('r', "realtime", &top.realtime_prio,
|
|
"collect data with this RT SCHED_FIFO priority"),
|
|
OPT_INTEGER('d', "delay", &top.delay_secs,
|
|
"number of seconds to delay between refreshes"),
|
|
OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
|
|
"dump the symbol table used for profiling"),
|
|
OPT_INTEGER('f', "count-filter", &top.count_filter,
|
|
"only display functions with more events than this"),
|
|
OPT_BOOLEAN(0, "group", &opts->group,
|
|
"put the counters into a counter group"),
|
|
OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
|
|
"child tasks do not inherit counters"),
|
|
OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
|
|
"symbol to annotate"),
|
|
OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
|
|
OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
|
|
OPT_INTEGER('E', "entries", &top.print_entries,
|
|
"display this many functions"),
|
|
OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
|
|
"hide user symbols"),
|
|
OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
|
|
OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
|
|
OPT_INCR('v', "verbose", &verbose,
|
|
"be more verbose (show counter open errors, etc)"),
|
|
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
|
|
"sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
|
|
" Please refer the man page for the complete list."),
|
|
OPT_STRING(0, "fields", &field_order, "key[,keys...]",
|
|
"output field(s): overhead, period, sample plus all of sort keys"),
|
|
OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
|
|
"Show a column with the number of samples"),
|
|
OPT_CALLBACK_NOOPT('g', NULL, &top.record_opts,
|
|
NULL, "enables call-graph recording",
|
|
&callchain_opt),
|
|
OPT_CALLBACK(0, "call-graph", &top.record_opts,
|
|
"mode[,dump_size]", record_callchain_help,
|
|
&parse_callchain_opt),
|
|
OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
|
|
"Accumulate callchains of children and show total overhead as well"),
|
|
OPT_INTEGER(0, "max-stack", &top.max_stack,
|
|
"Set the maximum stack depth when parsing the callchain. "
|
|
"Default: " __stringify(PERF_MAX_STACK_DEPTH)),
|
|
OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
|
|
"ignore callees of these functions in call graphs",
|
|
report_parse_ignore_callees_opt),
|
|
OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
|
|
"Show a column with the sum of periods"),
|
|
OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
|
|
"only consider symbols in these dsos"),
|
|
OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
|
|
"only consider symbols in these comms"),
|
|
OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
|
|
"only consider these symbols"),
|
|
OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
|
|
"Interleave source code with assembly code (default)"),
|
|
OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
|
|
"Display raw encoding of assembly instructions (default)"),
|
|
OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
|
|
"Enable kernel symbol demangling"),
|
|
OPT_STRING(0, "objdump", &objdump_path, "path",
|
|
"objdump binary to use for disassembly and annotations"),
|
|
OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
|
|
"Specify disassembler style (e.g. -M intel for intel syntax)"),
|
|
OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
|
|
OPT_CALLBACK(0, "percent-limit", &top, "percent",
|
|
"Don't show entries under that percent", parse_percent_limit),
|
|
OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
|
|
"How to display percentage of filtered entries", parse_filter_percentage),
|
|
OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
|
|
"width[,width...]",
|
|
"don't try to adjust column width, use these fixed values"),
|
|
OPT_END()
|
|
};
|
|
const char * const top_usage[] = {
|
|
"perf top [<options>]",
|
|
NULL
|
|
};
|
|
|
|
top.evlist = perf_evlist__new();
|
|
if (top.evlist == NULL)
|
|
return -ENOMEM;
|
|
|
|
perf_config(perf_top_config, &top);
|
|
|
|
argc = parse_options(argc, argv, options, top_usage, 0);
|
|
if (argc)
|
|
usage_with_options(top_usage, options);
|
|
|
|
sort__mode = SORT_MODE__TOP;
|
|
/* display thread wants entries to be collapsed in a different tree */
|
|
sort__need_collapse = 1;
|
|
|
|
if (setup_sorting() < 0) {
|
|
if (sort_order)
|
|
parse_options_usage(top_usage, options, "s", 1);
|
|
if (field_order)
|
|
parse_options_usage(sort_order ? NULL : top_usage,
|
|
options, "fields", 0);
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
if (top.use_stdio)
|
|
use_browser = 0;
|
|
else if (top.use_tui)
|
|
use_browser = 1;
|
|
|
|
setup_browser(false);
|
|
|
|
status = target__validate(target);
|
|
if (status) {
|
|
target__strerror(target, status, errbuf, BUFSIZ);
|
|
ui__warning("%s\n", errbuf);
|
|
}
|
|
|
|
status = target__parse_uid(target);
|
|
if (status) {
|
|
int saved_errno = errno;
|
|
|
|
target__strerror(target, status, errbuf, BUFSIZ);
|
|
ui__error("%s\n", errbuf);
|
|
|
|
status = -saved_errno;
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
if (target__none(target))
|
|
target->system_wide = true;
|
|
|
|
if (perf_evlist__create_maps(top.evlist, target) < 0)
|
|
usage_with_options(top_usage, options);
|
|
|
|
if (!top.evlist->nr_entries &&
|
|
perf_evlist__add_default(top.evlist) < 0) {
|
|
ui__error("Not enough memory for event selector list\n");
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
symbol_conf.nr_events = top.evlist->nr_entries;
|
|
|
|
if (top.delay_secs < 1)
|
|
top.delay_secs = 1;
|
|
|
|
if (record_opts__config(opts)) {
|
|
status = -EINVAL;
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
top.sym_evsel = perf_evlist__first(top.evlist);
|
|
|
|
if (!symbol_conf.use_callchain) {
|
|
symbol_conf.cumulate_callchain = false;
|
|
perf_hpp__cancel_cumulate();
|
|
}
|
|
|
|
symbol_conf.priv_size = sizeof(struct annotation);
|
|
|
|
symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
|
|
if (symbol__init(NULL) < 0)
|
|
return -1;
|
|
|
|
sort__setup_elide(stdout);
|
|
|
|
get_term_dimensions(&top.winsize);
|
|
if (top.print_entries == 0) {
|
|
struct sigaction act = {
|
|
.sa_sigaction = perf_top__sig_winch,
|
|
.sa_flags = SA_SIGINFO,
|
|
};
|
|
perf_top__update_print_entries(&top);
|
|
sigaction(SIGWINCH, &act, NULL);
|
|
}
|
|
|
|
status = __cmd_top(&top);
|
|
|
|
out_delete_evlist:
|
|
perf_evlist__delete(top.evlist);
|
|
|
|
return status;
|
|
}
|